Blackland remineralization leached by various mountain soils
2008
Tskhovrebov, V. S. | Kalugin, D. V. | Lysenko, V. Ya., Stavropol State Agrarian Univ. (Russian Federation)
The intensive use of farm lands leads to the gradual soil exhaustion. Leache blacklands are one of the blackland subtypes being in the first stage of degradation. The greatest deficiency is phosphorus, calcium, sulphus and such microelements as copper, manganese, molybdenum, cobalt, zinc. The research was carried out at the experimental station of the University. The main idea of the test was to increase soil fertility by separate and joined application of the following mountain rocks — apatites, shell limestone, phospho-eypsum and loessial loam. Apatite was applied to eliminate the deficiency of phosphorus, shell limestone — to eliminate calcium deficiency and some microelements, phospho-gypsum — to eliminate sulphus deficiency. Loessial loam is used for rejuvenation of a soil mineral part. According to the research the least corn yield for silage was on the control and was 277 800 kg/h. Wheп applied loessial loam the yield was increased by 12.9 %. Separate application of shell limestone, apatite and gypsum had the same effect and yield increase was 15-23 %. The greatest land-reclamation effect was received by the joint application of different mountain soils (28.3—31.7 %)
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